Improvement in sheer-rudders for booms



UNITED TA'IES LEVI W. POND, OF EAU CLAIRE, WISCONSIN, ASSIGNOR OFONE-HALF HIS RIGHT TO EAU CLAIRE LUMBER COMPANY, OF SAME PLACE.

IMPROVEMENT IN SHEER-RUDDERS FCR BQOMS.

Specification forming part of Letters Patent No. 160,347, dated March 2,1875; application filed July 13, 1874.

CASE A.

To all whom it may concern:

Be it known that l, LEVI W. POND, of Eau Claire, county of Eau Claire,Wisconsin, have invented a new and useful Improvement in Sheer-RudderBooms, of which the following is a full description, reference being hadto the accompanying drawings.

Figure 1 is a plan Fig. 2, a section at 00; Fig. 3, a section at y.

This invention consists in connecting a movable bar with the boom, towhich bar are hinged the wings or rudders, which operate the boom, theposition of the bar and wings being changed by moving the barlongitudinally by means ofropes and a Windlass secured to the main boom.

In the drawings, A is the boom, or a section thereof, the upper end ofwhich is to be secured to a pier or post, B, as usual. I) is a movablebar, made of wood. It may be twelve inches wide and four "inches thick.It is loosely connected with the boom A by means of straps a, secured tothe boom. These straps project beyond the edge of the boom, and in theseprojecting ends are two rods or pins, between which the bar I) passes.To allow it to move more freely friction-rollers e 0 may be placed uponthe rods or pins. 0 c are wings or rudders, hinged at d to the bar I). fis a rope or chain, secured to the several rudders and to the boom at n,the rudders being parallel to each other.

Upon the boom A is a Windlass, g, to which two ropes are connected. Theouter end of one of these ropes h is secured to the bar I) at t, or itmight be secured at r just above the rudder 0; the other rope, k, is, atits outer end, secured to the bar I) at on. By means ofthese ropes h kand the Windlass, the position of the bar I) and the rudders can bechanged.

As represented in Fig. l, the boom is thrown out into the stream, andthe rudders are in the proper position to throw it out and hold itthere; or, if the boom should strike the shore, or the bar strike, thebar may be quickly thrown out into the stream, which will bring theruddersin proper position to hold the boom from the shore.

If the rope 7c be wound upon the Windlass g, the bar I) will be drawnup, relaxing the rope f between the rudder c and n, and the rudders willswing around nearly parallel with the boom, and the boom, by the actionof the current, will be swung around near the shore.

By winding up the rope h on the Windlass the bar I) will be drawn down,and the rudders brought into the position represented by dotted lines,and then the action of the current upon the rudders will assist inbringing the boom to the shore. This feature will be found desirablewhen it is important to open the boom rapidly.

have shown only one section of a boom; but as many parts A and b may beused as may be required, the same being properly sesured to each otherat the ends.

The rope fonly serves the purpose of bolding the rudders in position,and a rod or rods might be used instead of this rope; or a brace runningfrom each rudder to the boom might be used instead off,- but theconstruction shown is the best.

When two or more sections are used in constructing the boom, the angleat which it stands with the shore will be less than is shown in Fig.1;and when it is desired to have the boom opened by the direct action ofthe current on the rudders, the bar must be carried down so that therudders will stand at an angle with the current less than a right angle.

The bar I) might be operated by means of a rack secured to the bar, andapinion secured to the boom A.

WVhat I claim as new, and desire to secure by Letters Patent, is asfollows:

The combination of the boom A, movable bar I), and rudders c c withsuitable operating devices, substantially as and for the purposesspecified.

LEVI W. POND.

Witnesses:

E. A. Instr, 0. W. BOND.

